From 1d64853193602f1100b835a4824da14c4258e5da Mon Sep 17 00:00:00 2001 From: Jeff Fan Date: Tue, 22 Mar 2016 09:55:28 +0800 Subject: UefiCpuPkg/PiSmmCpuDxeSmm: Allocate buffer for global semaphores Get semaphores alignment/size requirement and allocate aligned buffer for all global spin lock and semaphores. Cc: Michael Kinney Cc: Feng Tian Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan Reviewed-by: Feng Tian Reviewed-by: Michael Kinney Regression-tested-by: Laszlo Ersek --- UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 46 ++++++++++++++++++++++++++++++ UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h | 19 ++++++++++++ 2 files changed, 65 insertions(+) (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm') diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c index 952cc87a20..aa25f3ea47 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c @@ -21,6 +21,8 @@ UINT64 gSmiMtrrs[MTRR_NUMBER_OF_FIXED_MTRR UINT64 gPhyMask; SMM_DISPATCHER_MP_SYNC_DATA *mSmmMpSyncData = NULL; UINTN mSmmMpSyncDataSize; +SMM_CPU_SEMAPHORES mSmmCpuSemaphores; +UINTN mSemaphoreSize; /** Performs an atomic compare exchange operation to get semaphore. @@ -1193,6 +1195,48 @@ Exit: AsmWriteCr2 (Cr2); } +/** + Allocate buffer for all semaphores and spin locks. + +**/ +VOID +InitializeSmmCpuSemaphores ( + VOID + ) +{ + UINTN ProcessorCount; + UINTN TotalSize; + UINTN GlobalSemaphoresSize; + UINTN SemaphoreSize; + UINTN Pages; + UINTN *SemaphoreBlock; + UINTN SemaphoreAddr; + + SemaphoreSize = GetSpinLockProperties (); + ProcessorCount = gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus; + GlobalSemaphoresSize = (sizeof (SMM_CPU_SEMAPHORE_GLOBAL) / sizeof (VOID *)) * SemaphoreSize; + TotalSize = GlobalSemaphoresSize; + DEBUG((EFI_D_INFO, "One Semaphore Size = 0x%x\n", SemaphoreSize)); + DEBUG((EFI_D_INFO, "Total Semaphores Size = 0x%x\n", TotalSize)); + Pages = EFI_SIZE_TO_PAGES (TotalSize); + SemaphoreBlock = AllocatePages (Pages); + ASSERT (SemaphoreBlock != NULL); + ZeroMem (SemaphoreBlock, TotalSize); + + SemaphoreAddr = (UINTN)SemaphoreBlock; + mSmmCpuSemaphores.SemaphoreGlobal.Counter = (UINT32 *)SemaphoreAddr; + SemaphoreAddr += SemaphoreSize; + mSmmCpuSemaphores.SemaphoreGlobal.InsideSmm = (BOOLEAN *)SemaphoreAddr; + SemaphoreAddr += SemaphoreSize; + mSmmCpuSemaphores.SemaphoreGlobal.AllCpusInSync = (BOOLEAN *)SemaphoreAddr; + SemaphoreAddr += SemaphoreSize; + mSmmCpuSemaphores.SemaphoreGlobal.PFLock = (SPIN_LOCK *)SemaphoreAddr; + SemaphoreAddr += SemaphoreSize; + mSmmCpuSemaphores.SemaphoreGlobal.CodeAccessCheckLock + = (SPIN_LOCK *)SemaphoreAddr; + + mSemaphoreSize = SemaphoreSize; +} /** Initialize un-cacheable data. @@ -1215,6 +1259,8 @@ InitializeMpSyncData ( mSmmMpSyncData->BspIndex = (UINT32)-1; } mSmmMpSyncData->EffectiveSyncMode = (SMM_CPU_SYNC_MODE) PcdGet8 (PcdCpuSmmSyncMode); + + InitializeSmmCpuSemaphores (); } } diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h index 94a9345d11..f846e190ba 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h @@ -354,6 +354,25 @@ typedef struct { UINT64 MtrrBaseMaskPtr; // Offset 0x58 } PROCESSOR_SMM_DESCRIPTOR; + +/// +/// All global semaphores' pointer +/// +typedef struct { + volatile UINT32 *Counter; + volatile BOOLEAN *InsideSmm; + volatile BOOLEAN *AllCpusInSync; + SPIN_LOCK *PFLock; + SPIN_LOCK *CodeAccessCheckLock; +} SMM_CPU_SEMAPHORE_GLOBAL; + +/// +/// All semaphores' information +/// +typedef struct { + SMM_CPU_SEMAPHORE_GLOBAL SemaphoreGlobal; +} SMM_CPU_SEMAPHORES; + extern IA32_DESCRIPTOR gcSmiGdtr; extern IA32_DESCRIPTOR gcSmiIdtr; extern VOID *gcSmiIdtrPtr; -- cgit v1.2.3